Home / 30,425.60-45,638.40-18,700.80

Finding the Fourth Proportional to 30,425.60, 45,638.40 and 18,700.80

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Solution

The fourth proportional to 30,425.60, 45,638.40 and 18,700.80 is: 28,051.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,425.60 : 45,638.40 = 18,700.80 : x
  2. Step 2: Convert to fraction form
    30,425.60/45,638.40 = 18,700.80/x
  3. Step 3: Cross multiply
    30,425.60x = 45,638.40 × 18,700.80
  4. Step 4: Simplify right side
    30,425.60x = 853,474,590.72
  5. Step 5: Solve for x
    x = 853,474,590.72/30,425.60
  6. Step 6: Final answer
    x = 28,051.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.